The question is a request for strictness. Fine, I'm going to play along.

The phrase "for computer enthusiasts and power users" is not equivalent to "only for computer enthusiasts and power users".

The page containing the phrase is entitled "What topics can I ask about here?". If it was entitled "Whom is this site for?" then I would expect it to answer this exact question comprehensively, so from the lack of descriptions other than "computer enthusiasts" and "power users" I would conclude the site is only for them.

Instead the page is about topics, i.e. about questions, not about users. The sentence "Super User is for computer enthusiasts and power users" is just a preamble and I see no reason to assume there is (or ever supposed to be) an implicit "only" there.

You pointed out that "power user" is reasonably well defined, reasonably well measurable; and "computer enthusiast" (allegedly) is not. What difference does it make? Nobody verifies if any user is a "computer enthusiast" or a "power user"; we have no means to do so even for the well-defined term.

What matters is being on-topic (for questions) and answering the question (for answers). Even if one is neither a "computer enthusiast" (whatever it means) nor a "power user", but manages to write a suitable question or answer, then it fits. For questions this is explicitly stated on the linked page:

If you have a question about …

[…]

and it is not about …

[…]

… then you’re in the right place to ask your question!

For me the phrase "for computer enthusiasts and power users" is fine as it is.

The question is a request for strictness. Fine, I'm going to play along.

The phrase "for computer enthusiasts and power users" is not equivalent to "only for computer enthusiasts and power users".

The page containing the phrase is entitled "What topics can I ask about here?". If it was entitled "Whom is this site for?" then I would expect it to answer this exact question comprehensively, so from the lack of descriptions other than "computer enthusiasts" and "power users" I would conclude the site is only for them.

Instead the page is about topics, i.e. about questions, not about users. The sentence "Super User is for computer enthusiasts and power users" is just a preamble and I see no reason to assume there is (or ever supposed to be) an implicit "only" there.

You pointed out that "power user" is reasonably well defined, reasonably well measurable; and "computer enthusiast" (allegedly) is not. What difference does it make? Nobody verifies if any user is a "computer enthusiast" or a "power user"; we have no means to do so even for the well-defined term.

It's not a coincidence "What topics can I ask about here?" exists as a help page and "Whom is this site for?" does not. The important thing is being on-topic (for questions) and answering the question (for answers). Even if one is neither a "computer enthusiast" (whatever it means) nor a "power user", but manages to write a suitable question or answer, then it fits.

For me the phrase "for computer enthusiasts and power users" is fine as it is.

The question is a request for strictness. Fine, I'm going to play along.

The phrase "for computer enthusiasts and power users" is not equivalent to "only for computer enthusiasts and power users".

The page containing the phrase is entitled "What topics can I ask about here?". If it was entitled "Whom is this site for?" then I would expect it to answer this exact question comprehensively, so from the lack of descriptions other than "computer enthusiasts" and "power users" I would conclude the site is only for them.

Instead the page is about topics, i.e. about questions, not about users. The sentence "Super User is for computer enthusiasts and power users" is just a preamble and I see no reason to assume there is (or ever supposed to be) an implicit "only" there.

You pointed out that "power user" is reasonably well defined, reasonably well measurable; and "computer enthusiast" (allegedly) is not. What difference does it make? Nobody verifies if any user is a "computer enthusiast" or a "power user"; we have no means to do so even for the well-defined term.

What matters is being on-topic (for questions) and answering the question (for answers). Even if one is neither a "computer enthusiast" (whatever it means) nor a "power user", but manages to write a suitable question or answer, then it fits.

For me the phrase in question is fine as it is.

The question is a request for strictness. Fine, I'm going to play along.

The phrase "for computer enthusiasts and power users" is not equivalent to "only for computer enthusiasts and power users".

The page containing the phrase is entitled "What topics can I ask about here?". If it was entitled "Whom is this site for?" then I would expect it to answer this exact question comprehensively, so from the lack of descriptions other than "computer enthusiasts" and "power users" I would conclude the site is only for them.

Instead the page is about topics, i.e. about questions, not about users. The sentence "Super User is for computer enthusiasts and power users" is just a preamble and I see no reason to assume there is (or ever supposed to be) an implicit "only" there.

You pointed out that "power user" is reasonably well defined, reasonably well measurable; and "computer enthusiast" (allegedly) is not. What difference does it make? Nobody verifies if any user is a "computer enthusiast" or a "power user"; we have no means to do so even for the well-defined term.

What matters is being on-topic (for questions) and answering the question (for answers). Even if one is neither a "computer enthusiast" (whatever it means) nor a "power user", but manages to write a suitable question or answer, then it fits. For questions this is explicitly stated on the linked page:

If you have a question about …

[…]

and it is not about …

[…]

… then you’re in the right place to ask your question!

For me the phrase "for computer enthusiasts and power users" is fine as it is.